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diff --git a/src/org/jivesoftware/smackx/bytestreams/BytestreamManager.java b/src/org/jivesoftware/smackx/bytestreams/BytestreamManager.java
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+/**
+ * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.jivesoftware.smackx.bytestreams;
+
+import java.io.IOException;
+
+import org.jivesoftware.smack.XMPPException;
+import org.jivesoftware.smackx.bytestreams.ibb.InBandBytestreamManager;
+import org.jivesoftware.smackx.bytestreams.socks5.Socks5BytestreamManager;
+
+/**
+ * BytestreamManager provides a generic interface for bytestream managers.
+ * <p>
+ * There are two implementations of the interface. See {@link Socks5BytestreamManager} and
+ * {@link InBandBytestreamManager}.
+ * 
+ * @author Henning Staib
+ */
+public interface BytestreamManager {
+
+    /**
+     * Adds {@link BytestreamListener} that is called for every incoming bytestream request unless
+     * there is a user specific {@link BytestreamListener} registered.
+     * <p>
+     * See {@link Socks5BytestreamManager#addIncomingBytestreamListener(BytestreamListener)} and
+     * {@link InBandBytestreamManager#addIncomingBytestreamListener(BytestreamListener)} for further
+     * details.
+     * 
+     * @param listener the listener to register
+     */
+    public void addIncomingBytestreamListener(BytestreamListener listener);
+
+    /**
+     * Removes the given listener from the list of listeners for all incoming bytestream requests.
+     * 
+     * @param listener the listener to remove
+     */
+    public void removeIncomingBytestreamListener(BytestreamListener listener);
+
+    /**
+     * Adds {@link BytestreamListener} that is called for every incoming bytestream request unless
+     * there is a user specific {@link BytestreamListener} registered.
+     * <p>
+     * Use this method if you are awaiting an incoming bytestream request from a specific user.
+     * <p>
+     * See {@link Socks5BytestreamManager#addIncomingBytestreamListener(BytestreamListener, String)}
+     * and {@link InBandBytestreamManager#addIncomingBytestreamListener(BytestreamListener, String)}
+     * for further details.
+     * 
+     * @param listener the listener to register
+     * @param initiatorJID the JID of the user that wants to establish a bytestream
+     */
+    public void addIncomingBytestreamListener(BytestreamListener listener, String initiatorJID);
+
+    /**
+     * Removes the listener for the given user.
+     * 
+     * @param initiatorJID the JID of the user the listener should be removed
+     */
+    public void removeIncomingBytestreamListener(String initiatorJID);
+
+    /**
+     * Establishes a bytestream with the given user and returns the session to send/receive data
+     * to/from the user.
+     * <p>
+     * Use this method to establish bytestreams to users accepting all incoming bytestream requests
+     * since this method doesn't provide a way to tell the user something about the data to be sent.
+     * <p>
+     * To establish a bytestream after negotiation the kind of data to be sent (e.g. file transfer)
+     * use {@link #establishSession(String, String)}.
+     * <p>
+     * See {@link Socks5BytestreamManager#establishSession(String)} and
+     * {@link InBandBytestreamManager#establishSession(String)} for further details.
+     * 
+     * @param targetJID the JID of the user a bytestream should be established
+     * @return the session to send/receive data to/from the user
+     * @throws XMPPException if an error occurred while establishing the session
+     * @throws IOException if an IO error occurred while establishing the session
+     * @throws InterruptedException if the thread was interrupted while waiting in a blocking
+     *         operation
+     */
+    public BytestreamSession establishSession(String targetJID) throws XMPPException, IOException,
+                    InterruptedException;
+
+    /**
+     * Establishes a bytestream with the given user and returns the session to send/receive data
+     * to/from the user.
+     * <p>
+     * See {@link Socks5BytestreamManager#establishSession(String)} and
+     * {@link InBandBytestreamManager#establishSession(String)} for further details.
+     * 
+     * @param targetJID the JID of the user a bytestream should be established
+     * @param sessionID the session ID for the bytestream request
+     * @return the session to send/receive data to/from the user
+     * @throws XMPPException if an error occurred while establishing the session
+     * @throws IOException if an IO error occurred while establishing the session
+     * @throws InterruptedException if the thread was interrupted while waiting in a blocking
+     *         operation
+     */
+    public BytestreamSession establishSession(String targetJID, String sessionID)
+                    throws XMPPException, IOException, InterruptedException;
+
+}